Water-insoluble phenyl-azo-phenyl monoazo dyestuffs

ABSTRACT

WATER-INSOLUBLE ORANGE TO RED MONOAZO DYESTUFFS OF THE FORMULA   1-(NC-CH2-CH2-N(-(CH2)4-O-R&#39;&#39;)-),3-(R-CO-NH-),4-(((NC)X,   (CL)Y-PHENYL)-N=N-)BENZENE   IN WHICH   R IS CH3 OR C2H5; R&#39;&#39; IS H OR -COR&#34;; R&#34; IS CH3,C2H5,OCH3 OR OC2H5; X IS 1 OR 2; AND Y IS 0, 1, 2 OR 3;   ARE DISCLOSED FOR DYEING HYDROPHOBIC FIBER MATEIALS, E.G. POLYESTER. THE DYEINGS ARE CHARACTERIZED BY GOOD FASTNESS TO ALKALINE BOILING AND GOOD FASTNESS TO SUBLIMATION.

States, Patent 3,651,040 WATER-INSOLUBLE PHENYL-AZO-PHENYL MONOAZO DYESTUFFS Winfried Kruckenberg, Leverkusen, Germany, assignor to Farbenfabriken Bayer Aktiengesellschaft, Leverkusen,

Germany No Drawing. Filed Feb. 12, 1969, Ser. No. 798,767 Claims priority, application Germany, Feb. 23, 1968, P 17 19 076.0 Int. Cl. C07c 107/06; C09b 29/08 US. Cl. 260207.1 6 Claims ABSTRACT OF THE DISCLOSURE Water-insoluble orange to red monoazo dyestuffs of the formula CHZCHZCN Dy llIHCOR 2)4 R in which R is CH or C H R is H or -COR";

R" is CH C l-I OCH or OC H xis 1 or 2; and yis0,1,2or3;

are disclosed for dyeing hydrophobic fiber materials, e.g. polyester. The dyeings are characterized by good fastness to alkaline boiling and good fastness to sublimation.

The object of the present invention comprises waterinsoluble monoazo dyestuffs of the general formula NHCOR in which R stands for CH or C H R means H or the radical COR" where R" denotes CH C H OCH or OC H x stands for the numbers 1 or 2; and y denotes the'numbers 0-3, as well as their production and use.

The orange to scarlet dyestuffs are obtained in the usual manner by coupling a diazotised amine of the formula Q (NO x m in which x and y have the same meaning as above, with coupling components of the formula CHzCHzCN in which R and R have the same meaning as above.

(III) 3,651,040 Patented Mar. 21, 1972 Coupling is preferably carried out in an acidic medium.

Suitable diazo components are, for example, 2-cyano- 4,5,6 trichloroaniline, 2 cyano-S-chloroaniline, 2,4-didicyanoaniline, 3,4 dicyanoaniline, 2,5-dichloro-4-cyanoaniline, 2,4 dicyano-G-chloroaniline, 2,5-dicyai1oaniline, 3,4-dichloro-2,6-dicyanoaniline, 3,4-dicyanoaniline.

Suitable coupling components are, for example,

EXAMPLE 1 14.9 g. 2,5-dicyano-aniline are dissolved in 200 g. of concentrated sulphuric acid and diazotised by the addition of 17 ml. nitrosyl-sulphuric acid ml. correspond to 42 g. nitrite) at 0-5 C. while stirring. The diazonium salt solution is poured with stirring into a solution of 30.9 g. of the compound of the formula CHZCHZCN in dilute sulphuric acid and ice. The mixture is then buffered to pH 5.5-6, first with a sodium hydroxide solution and then very slowly with sodium acetate, the product is filtered off with suction, washed and dried. The dyestutf so obtained is a reddish powder which dissolves in organic solvents with an orange colour. When dispersed by suitable means, the dyestutfs dyes polyethylene terephthalate fibres in clear orange shades of good fastness to sublimation, washing, light and boiling.

The following dyestuffs which dye fabrics of polyethylene terephthalate in the specified shades are obtained from the corresponding diazo and coupling components:

Cl Scarlet.

/CH2CH2CN l (CH2)4OCOCH Cl NHCO CH3 /CH2CH2CN (0119 011 Cl NHCO CH O1 Orange.

/CH2CH2CN (CHahOCOCH: N NHCO CH CHzCHzON =N N\ (CH2)4OH CN NHCOCzHu /CHzCHzCN Red.

| CH O O O CH (1N NHCO on; 3

CN Red.

C2H4CN C1 N=N N\ (01 910000113 C1 CN NHCO CH EXAMPLE 2 A mixed fabric of polyethylene glycol terephthalate/ cotton 67/33 is impregnated on a foulard in the usual manner with al iquor containing, per litre, 50 g. of a 30% dyestuff of the formula I 1 NHCO CH3 and 30 g. of an 80% dyestutf of the formula OH NBA =K SO CH;

SO3N8 QM S O NB N8 038 C., again washed with water, and dried. A scarlet bicolour dyeing is thus obtained of excellent levelness and very good fastness properties.

What is claimed is:

1. Dyestulf having the formula CHzCH CN CH3)AOCOR" NHCOR in which R is CH or C l-I R is CH C l-I x is 1 or 2; and yisO, 1,2or3. 2. The dyestufl of claim 1 having the formula cnzomon on OCOCH 3. The dyestuff of claim 1 having the formula cH cHzoN I I omhoooon,

(El NHCOCH;

4. The dyestuif of claim 1 having the formula on 000 on I1IHCOCH;

canon o1 N=N N} on 000011 1 N r mcocn,

References Cited UNITED STATES PATENTS 2/ 1961 Rhyner 260207.1 8/ 1966 Kruckenberg 260207 FOREIGN PATENTS 1,425,585 12/1965 France 260-207 JOSEPH REBOLD, Primary Examiner C. F. WARREN, Assistant Examiner US. Cl. X.R. 

